# Practice Test: Question Set - 22

**1. The perpendicular offset from the tan-get to the central point of the circular curve, is**

- (A)

*R*sin Î¸/2

- (B)

*R*cos Î¸/2

- (C)

*R*(1 - cos Î¸/2)

- (D)

*R*(1 - sin Î¸/2)

**2. The width of pavement in addition to a gravelled berm 1 m on either side for a two directional traffic recommended by Nagpur (India) Conference of Chief Engineers, is**

- (A) 4.7 m

- (B) 5.7 m

- (C) 6.7 m

- (D) 7.7 m

**3. Minimum stopping distance for moving vehicles on road with a design speed of 80 km/hour, is**

- (A) 80 m

- (B) 100 m

- (C) 120 m

- (D) 150 m

**4. The top height of a route marker above crown level is**

- (A) 1.50 m

- (B) 1.75 m

- (C) 2.00 m

- (D) 2.25 m

**5. Along horizontal curves, if centrifugal force exceeds lateral friction, vehicles may**

- (A) Skid

- (B) Slip

- (C) Not
be affected

- (D) None
of these

**6. Pick up the incorrect statement from the following. The super-elevation on roads is**

- (A) Directly
proportional to width of pavement

- (B) Directly
proportional to velocity of vehicles

- (C) Inversely
proportional to acceleration due to gravity

- (D) Inversely
proportional to the radius of curvature

**7. For clear distinct vision, images of obstructions should fall on the retina with a cone of**

- (A) 2°

- (B) 3°

- (C) 4°

- (D) 5°

**8. The basic formula for determination of pavement thickness was first suggested by**

- (A) Spangler

- (B) Picket

- (C) Kelly

- (D) Goldbeck

**9. If ‘**

*L’*meters is the distance between extreme axles of a vehicle, its gross load should not exceed- (A) 1525 (

*L*+ 4.3) - 14.7

*L*

^{2}

- (B) 1526 (

*L*+ 5.3) - 14.7

*L*

^{2}

- (C) 1525 (

*L*+ 6.3) - 14.7

*L*

^{2}

- (D) 1525 (

*L*+ 7.3) - 14.7

*L*

^{2}

**10. If**

*x*% is the gradient of an alignment and*y*% is the gradient after proper super-elevation along a curved portion of a highway, the differential grade along the curve, is- (A) (

*x*+

*y*) %

- (B) (

*x*-

*y*) %

- (C) (

*y*-

*x*) %

- (D) (

*y*+

*x*) %

**11. If**

*A*is the area of steel cross-section,_{t}*t*is working stress,*L*is width of road and W is weight of slab per square metre, the spacing of the tie bars for a longitudinal joint, is- (A) (100

*A*

_{t}×

*t*)/

*WL*

- (B) 100

*A*

_{t}/

*tWL*

- (C) (100

*WA*

_{t}×

*t*)/

*tL*

- (D) 100

*WL*/

*A*

_{t}t**12. The shape of a vertical curve, is**

- (A) Parabolic

- (B) Elliptical

- (C) Circular

- (D) Spiral

**13. If**

*L*is the length of the transition curves provided on either side of a circular curve of radius*R*, the maximum angle of deflection with tangent for the junctions of the transition curve and circular curve, is- (A)

*L*/

*R*

- (B)

*L*/2

*R*

- (C)

*L*/3

*R*

- (D) None
of these

**14. The inventor of road making as a building science, was**

- (A) Sully

- (B) Tresguet

- (C) Telford

- (D) Macadam

**15. The desirable camber for straight roads with water bound macadam or gravel surface, is**

- (A) 1 in 33 to 1
in 25

- (B) 1 in 40 to 1
in 33

- (C) 1 in 150 to
1 in 140

- (D) 1 in 160 to
1 in 140

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